Road maintenance work was very difficult, because the maintenance workers can only transfer heavy materials on their shoulders.

养护只有通过人力来进行，运输材料也只能靠肩挑背扛，养护起来特别困难而且特别辛苦。

When it comes to winter road maintenance, Finland is a very forward-thinking country.

在冬季道路维护方面， 芬兰是一个非常有远见的国家。

They are used to forecast the weather, anticipate road maintenance and diagnose diseases.

它们用于预测天气、预测道路维护和诊断疾病。